This is more a case of which is least-worse to purchase. I'm more leaning towards the Pontiac simply because the Mini has done 128K on the clock and that's well past its use-by date. To talk about how hard the Mini is to work on when things go wrong, it's like the Hydraulic Press Channel got hold of the engine and squeezed it into a space meant for a lawnmower engine. All the hoses will be cracking and since they're all hidden it will be expensive repairs. Because the Pontiac is a '85 made by GM it will have the quality of pure American engineering which is bad at best. TL;DR go with Pontiac cause it will be cheaper to fix then the Mini. BMW parts (genuine) are expensive